Inclosed safety device for fuses for electrical installations.



PTENIED PEB.v 27, 1906.

W. FELLENBERG. INCLOSED SPBTY DEVICE PGR FUSES FOR ELECTRICA L INSTALLATIONS.

APPLIGATION PLBD APR. 28. 1904.

...,All .IWJIIY 0f a, o

NTT) STATES PATENT OFFTCE. v i GERMANY,

FUSES FOR ELECTRlCAL lNSTALLATlONS.

./f WILHELM FELLENBERG, OF CHARLOTTENBERG,

lNCLOSED SAFETY DEVlCE FOR' No. 813,546. specification ef Letters Patent. rammed rei. er, i906.

ipa-mann nai iprii 23,1904. sain Nq. 205,367.

T all whom Be it known t may concern:

that l, VViLnELM FELLEN instance, as asbestos and the likef'which are arranged opposite to the fuses or completely BERG, a subject ci' the German Emperor, resurround them.

siding at Charlottenber in the'Empire o Fourth. Outlets arranged within the closed Germany, have invente a'certain new an casing above the places where the fuses are useful lnclosed Safety Device for Fuses for bent and filling up of all the hollow spaces by Electrical installations, of which the followmeans of substances adapted for sucha' puring is a specification. posesuch, fori instance, as emery, talc, or

l known with others w tion ofthe in coils, it is advantageous to the like. v

The safety device constructed in the manner just described is surrounded by an outside casing oi orcelain, stoneware, or glass, by means of w ich the heat produced by the maximum charge can be `conducted to the outside in a comparatively short time in suc a manner that no moisture can into the interior.

The blowing out of the'fuses without giving rise to fire, detonation, or explosion is insured by dividing the fuses as ble and arranging them or between partitions, b which means the separate arcs of the various fuses connecte in parallel are prevented from uniting. By arranging the fuses either in the'form of coi s or .in zigzag-form spark distances connected in seriesone behind the other are produced in each fuse', which extendin a uniform manner over the whole space of" the safety device,with the result that only a part of the fuse, and that at the point where it is The devices for insuring the pre er action of the fuses of electric plants must ie so con structed as to provide under all circumstances, even in the case of short-circuiting of powerful sources of energy and no matter what the potential or current strength, complete protection against iire, detonation, or explosion. Care must, however, be ,taken that 'theT do not become heated more than is avoidab e by wattless currents, and provision 'must be made by a suitable choice ofi-the materials employe for conducting the heat away. The safety device must, howevenbe of such a character that it can be used in the open as well as inplaces where there is moisture without the atter being trate into the inside. a

The essential feature of the safety device in question Vcrinsists in t' ,e combination of some Acharacteristics which are already hich are still new. o be able to produce a safety device which is really eiiicient against iire, detonation, or exi losion, it is necessary to unite these essen.- bent, melts. Any arc which may be formed tial features suitably adapted to correspon is blown out by the electromagnetic action of with the potential and strength of the curthe current, which is still further increased y rent to be employed in one combination:y the magnetic blowout if an armature-core The essential features of such a combination has been arrange in the inside of the coil.

' The spreading of the flames is prevented by filling up all the hollow spaces o the device with lffor instance, with emery, talc, or the like. Consequently when the fuses blow out the pressure of the o'as on each part of the device is reduced by 0.-- First. Separation of the fuses connected in parallel by partition-walls or by casings which completely surround them.

Second. The arrangement of the fuses either in the form of coils or in zigzag form, `in order to produce'sparking distances connected in series one behind the other and to extinguish the -arc by the electromagnetic accurrent. lf the fuses are arran ed have coils o an elliptic shape and to interpose an armaturecore for the pur ose ofproducing a magnetic bloweout, by w lch means the electromagnetic action of the current is still further increased.

Third. not easily inflammable interior space, and its explosive action is diminished by the increase of the inside space, which increase is due to tlie yielding o the pliable walls composed, as alread f stated, of insulating, not easily inflammable material, with the result that, provided tile limits permissible in practice have not been transgressemthe safety device cannot burst and no ames can penetrate to the outside, neither 'ble to hear any loud detonation. I

is it poss different forms o Pliableyielding walls of insulating,

Figures 1 t6'7 represent materialsfsuc orV in separate chambers tllie gas being spread uniformly throughout the who e`" glass, or similai` material, which is intended carrying out the' invention. ln Figs. 1 to f3 are shown the longitudinal and transverse sections oi suoli a safety,v device with the liuses arranged incoils. Figs. 4 and illustrate a device the 'fuses of which are arranged zig'- Zag-like, while in Figs. 6 and 7 are shown sectional views of plug-fuses.A

Referring to 'tlie drawings, a denotes the outside casing ol' the device composed of porcelain, nston'iware glass, or any other nonconduicling, insulating, relinicterj; material; the chambers, pipes, or partitions in which l the liuses are placed; c, Vtlie inses; d, the matei rial lor filling up the hollow spaeeswsuch as powderml emery, talc, carbid el silica, or any similar substance; e, the junction-contacts; j, the wall or the mantle, consisting olv elastic, cxpansibie, not inflammable, insulating inatcri.tl'-A'or instance, asbestos or any similar material which jields or expands under powerliul pressure and mayv be furnished with grooves in order to still further increase its yielding tendency; g, a cover of porcelain,

to protect the device against moisture; la, partition-walls for separating the fuses from each other, i, elliin'icalljvv shaped pieces through which the fuses, which are divided for the purpose of being arranged in coils, may pass, These pieces serve at the saine time as partition-walls for the arcs. lf, outlets at the points where the fuses are bent; Z, iron bridges lor coi'inecting lthe fuses, being oi a greater crossnon in order to prevent undue heattit the ere arranged in zigzag forni such bridges may lilies-'isc bc interposed in place olf windingsgl m, insulated armatureeoi'es. which may at the saine time serve as bolts lor holding the device in position; n, nach oi the saletv device; o, glass-wool or similar imatcrial ior loosely lilling up the spaces b v which the capacitgT of the cavitjY surrounding the iuse isincreased.

fibiatl. claim as n'rvinvention, and desire to secure bv Leiters Patent, is-

i. if letvi'lcvice for fuses consisting in combination of fuse-wires, non-coi'iductors upon which said wires are coiled and parti' tions between said wire coils substantiallv as descrilwd. i

22. il. safety device for fuses consisting in combination ol fuse-wires connected in parallel non-conductors upoirwliicli said insewires are coiled and partitions between said coils substantiallyY as described. i

il. safetyr device for fuses consisting in combination of luse-wires connected in parallel non-eonductors uponwhicli said insew` are coiled, partition between said coils and an elastic yielding inelosure i'or said wires substantialljyv as described.

Ll. i safety device lor fuses consisting in combination of inse-wires connected in parl allel non-conductors upon which said fusewii'es are coiled, partition between said coils,

an elastic yielding inelosureforsaid wires and 'filling material within said inclosure,subv stantially described.

5. A safetyv device for fuses consisting in combination of fuse-wires connected in parallel non-coi'iductors upon which said fusewires are coiled, partition between said coils, and an elastic yielding inclosure for said wires, and a non-coiiductingI casing inclosing the whole, substantially as described.

(l. A safety device for fuses consisting in combination oiffusei-wires connected in parallel non-conductors upon which said luscwires are coiled, partition between said coils, an elastic yielding inclosure lor said .wn-cs. and YFilling material within said inclowire, and a non conducting casing inclosing the whole, sul'i-stantiall)v as described.

7. A safety device for liuses consisting in combination of' luso-wires, 'non-coinluctors upon which said wires are coiled and partitions between saidwire coils, and an arniature -core within said fuse wire coils, substantially as described.

S. Ii safety device incluses consisting in combination of iiisewires connected in parallel non-conductors upon which said fusewires are coiled and partitions between said coils, and an armature-core within said tuscwire coils, substantially as described.

Q. A safety device for l'uses, consisting in combination 'oi fuse-wires sparking distance.` produced in series with said wires, and partitions between said liuse-wiresand an arma ture-core upon which said luse.- wires are mounted, substantialbr as described.

lt). A. safety device lor fuses consisting in combination of' iuse-wires, non-conductors upon which said wires are coiled and )artitions between said wire coils,V an elastic yielding inclosurelor said wires, and a casing ini'flosing the whole, substantially as de scribed.

il. A safety-fuse consistingin combinai lion oli iusewires, nonconductors upon which said wires are coiled said non-condom tors being oli elliptical forni and .partitions lietween said fuse-wires substantially aS dcscribed.

i2. A salety-fi1se'consisting in combination ol" fuse wires, noncrnnluctors upon which said fuse-wiresare coiled in series, pai titions between the non-conductors conductors connecting the h1se-wircs in series an in closingcasing divided longitudinally, said non-conductors being 'formed integral with the respective parts of said casing, bolts lor connecting the respect-ive parts ol' thecasing together said bolts passing through said non conductors` upon which the fuse wires are coiled and servingns armature cores, substantiallyas described.' I

A safetyiuse consisting in combinan tion of fuse-wires, non-conduclors upon which said iuseovires are coiled in series, pur- IIC XIS

titions between the non-conductors, conductors connecting the fuse-Wires in series an inclosing casing divided longitudinally, said non-conductors and partitions being formed integral withthe respective parts of said-casL ing, bolts for connecting the respective parts of the ycasing, together said 4 bolts passing through said non-conductors upon which the fuse-wires are coiled and serving as armaturecores and spaces within said casing between said partitions, yieldin elastic inclosures within said spaces and ing ymaterial Within said yielding elastic inclosures, substantially as` described.

14. A safety-fuse consisting in combination .of fuse wires, .non conductors upon which saidfuse-Wiresgare coiled in series, artitions between the non-conductors, con uctors connecting the fuse-wires in series,` an inclosing casing divided longitudinally, said non-conductors and partitions being formed integral with the respective parts of said casing, partitions upon said non-conductors between which said fuse-wires are arranged in series, bolts for connecting the respective arts of the casing together said bolts passing through said non-conductors upon which the fuse-wires are coiled and serving as armature-wires, substantially as described.

15. A safetyT device for fuses consisting in combination' of fuse wires, non conductors upon which said Wires are coiled and partitions between.A said wire coils and an inclosing. v

casing therefor' and outlets therefrom, substantlally as described.

In testirnony'whereo I have signed my name to this specification in the presence of two subscribin witnesses.

W LHELM FELLENBERG.

Witnesses:

WOLDEMAR. HAUPT, HENRY HAsPER. 

